<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>

<body>
    <div id="app">
        <p>搜索 <input type="text" v-model="goodInfo.search" /> </p>
    </div>
    <script>
        Vue.config.productionTip = false;

        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    goodInfo: {
                        search: "oppo",
                        price: 1888,
                        num: 10,
                    },
                };
            },
            watch: {
                goodInfo: {
                    immediate: true,
                    deep: true,
                    handler(newVal,oldVal){
                        console.log("goodInfo中有内容发生改变了",newVal,oldVal);
                    }
                }
            }
        })
    </script>
</body>

</html>